DETAILS LARCALC9 11.3.036.MI. Find the direction angles of the vector. (Round your answers to three decimal places.) u = -2i + 3j + 9k am rad B = rad Y = Master It DETAILS LARCALC9 11.3.016. Find the angle between the vectors. u = 31 +2j + k v = 21 - 3j 8 = 3. [-/3 Points] DETAILS LARCALC9 11.3.031. Find the direction cosines of u and demonstrate that the sum of the squares of the direction cosines is 1. u = i + 2j + 2k cos(a) = cos(B) = cos(y) H Need Help? 2. [-/1 Points] rad radians